# RAYSID — Unofficial RAYSID App > Companion app for RAYSID gamma spectrometer, displaying real-time radiation data and analysis. (iPhone/iPad app by Isai Olvera.) - Source: https://appshunter.io/ios/app/raysid/id6763330523 (this page in markdown: same URL + `.md`) - Developer: [Isai Olvera](https://appshunter.io/developer/1895267343) - Category: Utilities - Price: Free - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 16.0 · 145 MB - Languages: English - Released: 2026-06-18 - Data updated: 2026-07-17 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/raysid/id6763330523/reviews.md ## What is RAYSID? Raysid is the iOS companion app for the RAYSID CsI(Tl) gamma spectrometer. Connect to your RAYSID over Bluetooth and see radiation in real time: • Live count rate (CPS) and dose rate (µSv/h) • Accumulated dose and yearly projection • 33-bin coarse histogram for quick scanning • 1800-channel high-resolution spectrum with log or linear axis • Automatic isotope identification against a built-in library of 43 reference spectra (natural, medical, and industrial isotopes) • Device threshold alarms with phone notifications, sound, and haptic • Phone-side Geiger clicks through the speaker, AirPods, or car audio • Export the high-resolution spectrum as a standards-compliant N42 file • Local radiation map: record your readings geotagged to where you took them, view them by count rate or dose, with an optional community layer. Recorded only while the app is open; your map stays on your device. You'll need a RAYSID device to use this app. Your measurements, location, and recorded map stay on your phone - nothing is uploaded. This app is an independent companion and is not affiliated with the RAYSID device manufacturer. ## Key features - Real-time count rate and dose rate - Automatic isotope identification - High-resolution spectrum analysis - Device threshold alarms with notifications - Export spectrum data to N42 file - Phone-side Geiger clicks ## Frequently asked questions about RAYSID ### What is RAYSID? RAYSID is the companion app for the RAYSID CsI(Tl) gamma spectrometer. It allows you to connect to your RAYSID device via Bluetooth to view live radiation data and analyze spectra. ### Does RAYSID require a RAYSID device? Yes, you will need a RAYSID device to use this app. The app functions as a companion to the hardware, displaying and analyzing the data it collects. ### What kind of radiation data does RAYSID show? RAYSID displays live count rate (CPS) and dose rate (µSv/h), accumulated dose, and yearly dose projections. It also provides a 33-bin coarse histogram and a 1800-channel high-resolution spectrum. ### Can RAYSID identify isotopes? Yes, RAYSID features automatic isotope identification against a built-in library of 43 reference spectra, including natural, medical, and industrial isotopes. ### Does RAYSID store data in the cloud? No, RAYSID stores nothing in the cloud. All data collected and analyzed by the app stays on your phone, ensuring your privacy. ### Can RAYSID export spectrum data? Yes, RAYSID allows you to export the high-resolution spectrum as a standards-compliant N42 file. This file format is readable by InterSpec and other gamma-spectrum analysis tools. ### What devices does RAYSID support? RAYSID is currently supported on iPhones. The app is designed to work with iOS devices. ### How often is RAYSID updated? The latest version of RAYSID is 1.1, which was last updated on June 28, 2026. Updates typically include bug fixes and feature enhancements. ## Version history (last 3 releases) ### v1.2 — 2026-07-01 Version 1.2 • New: Local radiation Map. Record your readings geotagged to where you took them and see them as a colour-coded overlay (count rate or dose rate). Tap the locate button to centre on your position - no recording required. • New: Optional community map layer, showing public RAYSID readings from raysid.com. Toggle it on or off anytime. • Improved isotope identification: more reliable peak detection on high-count spectra, so clear peaks are highlighted as expected. Your measurements, location, and recorded map stay on your device. The map is recorded only while the app is open (no background tracking). ### 1.1 — 2026-06-28 Version 1.1 - User Calibration & Improved Isotope ID • Energy calibration: anchor the keV scale to known peaks from a calibration source for accurate isotope identification. Cubic-spline interpolation across 1–4 calibration points; per-device and per-range storage so each RAYSID and energy range remembers its own calibration. • Pick calibration anchors directly from detected peaks in your live spectrum, choose from a library of common gamma lines (Cs-137, K-40, U-238 chain, Th-232 chain, Co-60, Eu-152, Am-241, more), or enter values manually. • Isotope Detail Sheet: tap any isotope match to see its library reference spectrum overlaid on yours, a peak-by-peak comparison table, half-life and decay-mode metadata, and the detected peak list. • Isotope ID accuracy: matcher now intensity-weights peak comparisons and penalizes missing high-confidence library lines. Fixes false-positive matches where peaks aligned numerically but the source was different. • Cleaner peak detection: Poisson statistical filtering removes false "peaks" in the noise floor at high energies. • UI polish: denser keV-axis ticks on the spectrum chart, calibration point editor with monotonicity warnings, immediate post-Apply feedback. ### 1.0 — 2026-06-18 No release notes. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-17.*